<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
   <script>
       var a = 5;
       var b = 3;
       console.log("a += b = "+(a += b));  //a = a + b;
       console.log("a -= b = "+(a -= b));  //a = a - b;
       console.log("a /= b = "+(a /= b));  //a = a / b;
       var c = 8;
       var d = 2;
       console.log("c %= d = "+(c %= d));  //c = c % d;
   </script>
</body>
</html>